Удалите один и тот же элемент в listview1 и txt.файл (в то же время) C#

Hello guys,

I wish that when I remove the selected item in listView1 that then this same item be removed in a txt.File (at the same time).
Something like the code below, but this code does not work. Please Help. Thank you.
(App, target framework: NETFramework 3.5)

private void remove()
        {
            string filedata = File.ReadAllText(@"D:\Test.txt");
            string replacedata = "";
            DialogResult result = MessageBox.Show("Are you sure to delete?", "Confirm Delete", MessageBoxButtons.YesNo);

            if (result.Equals(DialogResult.Yes))
            {
                for (int i = 0; i < listView1.Items.Count; i++)
                {
                    if (listView1.Items[i].Selected)
                    {

                        replacedata = filedata.Replace(listView1.SelectedItems[0] + Environment.NewLine, "");
                        listView1.Items[i].Remove();
                        i--;
                    }
                }
                File.WriteAllText(@"D:\Test.txt", replacedata);
            }
            else if (result == DialogResult.No)
            {
                return;
            }
        }